Retransmission control method and transmitting-side apparatus

Abstract

In a retransmission control method, each of a transmitting-side apparatus and a receiving-side apparatus includes a first layer and a second layer; and first retransmission control processing is performed between the first layer of the transmitting-side apparatus and the first layer of the receiving-side apparatus, and second retransmission control processing is performed between the second layer of the transmitting-side apparatus and the second layer of the receiving-side apparatus; the first layer of the transmitting-side apparatus determines whether or not specific user data is under the second retransmission control processing, when receiving a retransmission request for the specific user data from the first layer of the receiving-side apparatus, during the first retransmission control processing; and the first layer of the transmitting-side apparatus does not retransmit the specific user data, when determining that the specific user data is under the second retransmission control processing.

1 . A retransmission control method for performing retransmission control processing for user data between a transmitting-side apparatus and a receiving-side apparatus, wherein
 each of the transmitting-side apparatus and the receiving-side apparatus includes a first layer and a second layer that is of a lower layer to the first layer; and   first retransmission control processing is performed between the first layer of the transmitting-side apparatus and the first layer of the receiving-side apparatus, and second retransmission control processing is performed between the second layer of the transmitting-side apparatus and the second layer of the receiving-side apparatus;   the method comprising the steps of:   determining, at the first layer of the transmitting-side apparatus, whether or not specific user data is under the second retransmission control processing, when receiving a retransmission request for the specific user data from the first layer of the receiving-side apparatus, during the first retransmission control processing; and   not retransmitting, at the first layer of the transmitting-side apparatus, the specific user data, when determining that the specific user data is under the second retransmission control processing.   
   
   
       2 . The retransmission control method according to the  claim 1 , wherein
 the first layer is an RLC sublayer; and   the second layer is a MAC sublayer.   
   
   
       3 . The retransmission control method according to the  claim 2 , wherein
 the second retransmission control processing is HARQ retransmission control processing.   
   
   
       4 . A transmitting-side apparatus configured to perform retransmission control processing for user data, with a receiving-side apparatus, comprising:
 a first layer; and   a second layer that is of a lower layer to the first layer; wherein   first retransmission control processing is configured to be performed with a first layer of the receiving-side apparatus, and second retransmission control processing is configured to be performed with a second layer of the receiving-side apparatus;   the first layer of the transmitting-side apparatus is configured to determine whether or not specific user data is under the second retransmission control processing, when receiving a retransmission request for the specific user data from the first layer of the receiving-side apparatus, during the first retransmission control processing, and   the first layer of the transmitting-side apparatus is configured not to retransmit the specific user data, when determining that the specific data is under the second retransmission control processing.   
   
   
       5 . The transmitting-side apparatus according to  claim 4  wherein
 the first layer of the transmitting-side apparatus is an RLC sublayer; and   the second layer of the transmitting-side apparatus is a MAC sublayer.   
   
   
       6 . The transmitting-side apparatus according to  claim 5  wherein
 the second retransmission control processing is HARQ retransmission control processing.